From 744343ff5f6177e40524a1133dcddd687ab582b4 Mon Sep 17 00:00:00 2001
From: drewlanenga <drew.lanenga@gmail.com>
Date: Wed, 4 Dec 2024 14:44:41 -0800
Subject: [PATCH] maint: support unix timestamps from floats/scientific
 notation

---
 parseany.go      | 29 ++++++++++++++++++++---------
 parseany_test.go |  1 +
 2 files changed, 21 insertions(+), 9 deletions(-)

diff --git a/parseany.go b/parseany.go
index b9668b2..f7f333e 100644
--- a/parseany.go
+++ b/parseany.go
@@ -5,6 +5,7 @@ package dateparse
 
 import (
 	"fmt"
+	"math/big"
 	"strconv"
 	"strings"
 	"time"
@@ -170,15 +171,14 @@ func ParseIn(datestr string, loc *time.Location, opts ...ParserOption) (time.Tim
 // Set Location to time.Local.  Same as ParseIn Location but lazily uses
 // the global time.Local variable for Location argument.
 //
-//     denverLoc, _ := time.LoadLocation("America/Denver")
-//     time.Local = denverLoc
+//	denverLoc, _ := time.LoadLocation("America/Denver")
+//	time.Local = denverLoc
 //
-//     t, err := dateparse.ParseLocal("3/1/2014")
+//	t, err := dateparse.ParseLocal("3/1/2014")
 //
 // Equivalent to:
 //
-//     t, err := dateparse.ParseIn("3/1/2014", denverLoc)
-//
+//	t, err := dateparse.ParseIn("3/1/2014", denverLoc)
 func ParseLocal(datestr string, opts ...ParserOption) (time.Time, error) {
 	p, err := parseTime(datestr, time.Local, opts...)
 	if err != nil {
@@ -204,9 +204,8 @@ func MustParse(datestr string, opts ...ParserOption) time.Time {
 // ParseFormat parse's an unknown date-time string and returns a layout
 // string that can parse this (and exact same format) other date-time strings.
 //
-//     layout, err := dateparse.ParseFormat("2013-02-01 00:00:00")
-//     // layout = "2006-01-02 15:04:05"
-//
+//	layout, err := dateparse.ParseFormat("2013-02-01 00:00:00")
+//	// layout = "2006-01-02 15:04:05"
 func ParseFormat(datestr string, opts ...ParserOption) (string, error) {
 	p, err := parseTime(datestr, nil, opts...)
 	if err != nil {
@@ -714,7 +713,7 @@ iterRunes:
 				break
 			}
 		case dateDigitDot:
-			// This is the 2nd period
+			// This might be the 2nd period
 			// 3.31.2014
 			// 08.21.71
 			// 2014.05
@@ -735,6 +734,18 @@ iterRunes:
 					p.stateDate = dateDigitDotDot
 				}
 			}
+			// This is likely a unix-ish timestamp in scientific notation
+			// 1.384216367111e+12
+			if r == 'e' {
+				// try to convert to an int64
+				if f, err := strconv.ParseFloat(datestr, 64); err == nil {
+					bf := big.NewFloat(f)
+					bi, _ := bf.Int(nil)
+					datestr = bi.String()
+					p.stateDate = dateDigit
+					break iterRunes
+				}
+			}
 		case dateDigitDotDot:
 			// iterate all the way through
 		case dateAlpha:
diff --git a/parseany_test.go b/parseany_test.go
index 7fea1e6..2447afd 100644
--- a/parseany_test.go
+++ b/parseany_test.go
@@ -415,6 +415,7 @@ var testInputs = []dateTest{
 	{in: "1332151919", out: "2012-03-19 10:11:59 +0000 UTC"},
 	{in: "1332151919", out: "2012-03-19 10:11:59 +0000 UTC", loc: "America/Denver"},
 	{in: "1384216367111", out: "2013-11-12 00:32:47.111 +0000 UTC"},
+	{in: "1.384216367111e+12", out: "2013-11-12 00:32:47.111 +0000 UTC"},
 	{in: "1384216367111222", out: "2013-11-12 00:32:47.111222 +0000 UTC"},
 	{in: "1384216367111222333", out: "2013-11-12 00:32:47.111222333 +0000 UTC"},
 }